YariShogi is a Shogi variant invented by Christiaan
Freeling. It is played on a 9x7 board, with the last three ranks as the promotion zone.
YariShogi uses the same rules as shogi, except for the pieces
which are used and a few differences noted below.

These are the differences between Shogi and YariShogi:

YariShogi is played on a 9x7 board, with the last three
ranks being the promotion zone. This is the opening setup: